I. noun(pluralswans)Etymology: Middle English, from Old English; akin to Middle High German swan and perhaps to Latin sonus sound — more at soundDate: before 12th century1.plural alsoswan any of various large heavy-bodied long-necked mostly pure white aquatic birds (family Anatidae, especially genus Cygnus) that have webbed feet and are related to but larger than the geese
2. one that resembles or is likened to a swan
3.capitalized the constellation Cygnus
II. intransitive verb(swanned; swanning)Date: 1942
to wander aimlessly or idly ;dallyIII. intransitive verb(swanned; swanning)Etymology: perhaps euphemism for swearDate: 1784dialectdeclare, swear